Liner for centrifugal cream-separators



c. H. HACKETT.

LINER FOB CENTRIFUGAL CREAM SEPARATORS.

APPLICATION FILED SEPT.5, 1919.

1,328,084}, Patented Jan. 13, 19 20.

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UNITED STATES PATENT orrrc.

CHARLES H, HACKETT, OF WATER-LOO, IOWA, ASSIGN'OR TO WILBUR W. MARSH, OF

' WATERLOO, IOWA.

LINER FOR CENTRIFUGAL CREAM-SEPARATORS.

Specification of Letters Patent. Patented J an. 13, 1920.

Application filed September 5, 1919. Serial No. 321,785.

To all whom it may concern:

Be it known that I, CHARLES H. HACKETT, a citizen of the United States of America, and a resident of" Waterloo, Blackhawk county, Iowa, have invented certain new and useful Improvements in Liners for Centrifugal Cream-Separators, of which the following is a specification.

My invention relates to improvements in liners for centrifugal cream separators, and the object of my improvement is to provide spaced assembled separating devices whose form and arrangement are correlated most suitably to rapidly and completely separate the constituents of a liquid having different specific gravities.

This object I have accomplished by the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which Figure 1 is a cross section of several superimposed spaced like formed separating devices of one type diagrammatically illustrating my invention, and Fig. 2 is a greatly magnified fragmental cross section of two of said devices.

Similar numerals of reference denote corresponding parts throughout the several views.

As is well known, in the art of separating the lighter from the heavier constituents of a mixture of liquids, the most effective separation is accomplished by causing the liquids to traverse the interspaces of bailiing-means in the liquid container while the latter is being rapidly rotated to place its contents under the action of centrifugal force.

As the general construction and method of operation of such an apparatus is well known, I have merely illustrated herein the mechanical construction and arrangement according to my invention, of a few of such baffling-means, and which will hereinafter be termed a liner.

The liner elements of my invention are of the conical frustal type, and my invention consists in modifying the shape of such a conical element to thereby divide the interspace of any two like spaced superimposed concentric frusta into concentric stages or annular passages which decrease successively outwardly in their radial width, and in separating these successive spaces or passages by radially directed annular passages of greater width due to stepping said element at the latter places.

Each of the like liner elements 1 thus has i a general conical frustal shape, hollow, open at top and bottom, and stepped concentrically,usually horizontally, at 3, 5 and 7, thus dividing the frustum into a plurality of concentric frustal rings 2, 4, 6 and 8. The lower edge of each 'element 1 has the usual outwardly directed flange 10 for conveying a separated constituent of the liquid directly to the inner wall of a separator bowl. As many of the elements 1 may be superposed upon each other as may be desired, and may be held in a spaced apart relation by any desired spacing means. The upper openings 9 will then be alined and concentric with the axis of the bowl indicated in Fig. 1 by the line a-a. The several frustal parts 8, 6, 4 and 2 of each liner element, are formed as frusta of cones of diiferent angularities, that is, the inclined surfaces of said frusta relative to the axis aa are formed with angles of successively decreasing extent outwardly from said axis. These angles may be of any desired number of degrees of inclination, but for purposes of illustration,

" I have shown the said frustal parts 8, 6, 4

and 2 respectively of inclinations of fifty, forty, thirty and twenty degrees relative to said axis. In the magnified construction shown in Fig. 2 is clearly shown the difierences in widths of interspaces of the opposed surfaces of said like frustal parts. This arrangement of the liner elements causes a progressive narrowing of the interspaces thereof, with the exception that the distance apart of the stepped parts 7 5 and 3 is greater in each case than the width of interspace of the opposed frustal parts on each side thereof. As is well known in the art, when the interspaces of such liner elements are progressively decreased in width relatively from the axis thereof, the mixed liquids, such as milk and cream, are so retarded in their movement radially that these constituents are permitted to become almost completely separated, the heavier element moving outwardly along the under or inner surface of each element 1, while the lighter element is forced inwardly over the outer surfaces of the elements, Usually, a small amount of the lighter element is carried out with the current of the heavier element through the delivery flanges 10. In my stepped elements, the wider interspaces of the opposed steps of the superposed elements provide interspaces of larger relative volume in Which the globules of the lighter cream may gather in a measure freed from the back pressure of the heavier milk near them. This results in a more complete stripping of the cream from the milk so that a perfect separation is accomplished.

In Fig. 2, the massing up'of the cream globules in the relatively wider interspaces of the steps is clearly shown, and as practice has clearly demonstrated, this means of stripping the cream from the milk is entirely 'efiectual,

The results obtained are similar, but possibly not quite as complete, when the successive stages or frustal parts of the liner elements are formed on the same angle rela tive to said axis,

Having described my invention, what I claim as new and desire to secure by Letters Patent, is: v

1. A liner for centrifugal liquid separators, comprising superimposed spaced separating devices, each device being formed of a plurality of stepped concentric frusta.

2. A liner for centrifugal liquid separators, comprising superimposed spaced separating devices, eachdevice being formed of a plurality of stepped concentric frusta, the angles of the frusta relative to their common axis successively decreasing in extent outwardly from said axis.

3. A liner for centrifugal liquid separators, comprising superimposed spaced separating devices, each device being formed of a plurality of stepped concentric frusta, the distances apart of the stepped parts be ing wider than the distances apart ofthe other portions of said frusta.

Signed at Waterloo, Iowa, this 5th day of Aug. 1919.

CHARLES H. HAOKETT. 

